Wire coiling and forming machine



June 21, SHERTZER WIRE COILING AND FORMING MACHINE Filed May 23, 1951 5 Sheets-Sheet 1 IIIHIHII [NHL Julie 21, 1932'.

L. A. SHERTZER WIRE COILING AND FORMING MACHINE Filed May 23, 1951 3 Sheets-Sheet 2 June 21, 1932. A, SHERTZER WIRE COILING AND FORMING MACHINE Filed ma 25, 19:51

3: Sheets-Sheet 3 Patented June 21, 1932 {UNITED STATES,

PATENT OFFICE if LEAVITI A. SHERTZER, F MASSILLON, OHIO, ASSIGNOR TO THE EATON-MANUFACTUR- ING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO WIRE COILING- AND FORMING MACHINE Application filed May 23,

This invention relates to machines for automatically forming lock washers, and the like, and has for one of its objects the provision of a machine that will produce washers,

having a plurality of convolutions and provided with an offset or reverse bend therein.

It is a further object of the invention to provide a machine, for the purpose referred to, which will be rapid in operation and capable of producing washers from comparatively heavy stock.

A further object of the invention is to pro vide a machine that will be entirely automatic in its operations-and in which the various parts of the machine will be so formed as to be durable and reliable in operation.

Other objects of the invention and the features of novelty will be apparent from the following description taken in connection with the accompanying drawings, of which Figure 1 is a side elevation of a machine embodying my invention, certain parts being broken away. 1

Fig. 2 is an elevation of the feeding mechanism as seen from the right side of Fig. 1, and with some of the feed wheels omitted.

Fig. 3 is a plan View of the washer forming mechanism.

Fig. 4 is a side elevation thereof.

Fig. 5 is a side elevation of the coiling and cutoff mechanism, shown in connection with a pair of the stock-feeding rolls.

Fig. 6 is a fragmentary section through the feeding mechanism on the line 6-6 of Fig. 5.

Fig. 7 is an enlarged side elevation of the coiling die.

Fig. 8 is a plan view thereof showing the bending die in cooperation therewith.

Fig. 9 is an elevation of the coiling die as seen from the left side of Fig. 7.

Fig. 10 is a sectionon the line 10 10 of Fig. 8, certain parts being shown in elevation and the cutoff die also being shown.

Fig. 11 is a fragmentary section on the line 1111 of Fig. 7.

Fig. 12 is an end elevation of the bending die; and

Fig. 13 is a perspectiveview of one of the completed wires which the machine is adapted to make. v

1931. Serial No. 539,555.

Referring to the drawings, indicates the frame of an ordinary form of stamping press having a shaft 21, which may be arrangedfor continuous rotation. The shaft 21 has. the usual crank therein which is connected with a reciprocating plunger 22 by means of a connecting rod 23. The usual fiy-wheel of the press is indicated at 24 andhas secured thereon a cam 25 and this cam has a hump 26 which cooperates with a roller 27 on a plunger 28. The shaft 21 carries a crank-disc 29 on one end thereof and this disc carries a sliding block 30 which is adjustable on a diameter of the disc 29, by means of a screw 31. The block 30 carries a crank pin 32 which is connected with an oscillating lever 33 by means ofa connecting rod 34. I

The lever 33 is pivoted on a shaft at 35 and carries a pawl 36 which cooperates with a ratchet wheel 37 so that this ratchet wheel will be intermittently rotated by the lever 33, the amount of the rotation being variable by adjusting the throw of the crank pin 32,

by means of the screw 31. The ratchet wheel 37 is keyed or otherwise secured to the shaft 35 and this shaft is mounted in bearings in the housings 38 and carries a gear 39 and a feed roller 40. Above the shaft 35 there is a shaft 41 which is mounted in bearing blocks 42 that are vertically adjustable in the housings 38, by means of a screw 43 and hand wheel 44. The shaft 41 carries a gear 45 that meshes with the gear 39, and a feed wheel 46 that cooperates with the wheel 40 to feed the stock, which is indicated at 47. When a heavy stock is to be fed it will usually be necessary to have more than one pair of feed wheels. In Fig. 1 I have shown an additional pair of feed wheels at 48 and 49. The

wheel 48 is mounted on a shaft 50 that is supported in suitable bearings on the housings 38 and may be driven by a gear similar to the gear 39, which is keyed thereto and which is driven from the gear 39 by means of an idler gear 51 that is mounted on a shaft 52. The feed wheel 49 is carried by a shaft 53 which is mounted in bearings 54, similar to the bearing 42, and arranged to be vertically adjusted, in the housings38, by means of the hand wheel 55; The shaft 53 may be driven by means of a pair of gears similar to the gears 39 and 45. Where the stock is especially heavy additional pairs of feed wheels may be provided and these may be driven from the shaft by an arrangement of gears similar to that described for driving the feed wheels 48 and 49.

Arranged on the bed 56, of the press, is a bracket 57 which supports an arbor 58 that is adjustable therein and secured by set screws 59 or in any other suitable manner. A bracket 60 is also secured to the bed56, adjacent the bracket 57 and carries a coiling die 61, the latter having a shank 62 that is se-.

cured in the bracket 60 by means of a set screw 63. Between the pair of feed wheels 40 and 46, and the coiling die 61, there is a guide 64 through which the stock 47 passes and this guide may be supported from the bed of the press.

A housing 65 is secured on the bed 56, of the press, and has slidably arranged therein a ram 66 whichcarries a die 67 that is counterbored as indicated at 68 to pass over the arbor 58.

The housing 65 has a vertical extension 69 in which the plunger 28 is adapted to reciprocate, the lower end of the plunger being connected with the ram 66 by means of a link 70. The link 70 is connected with the ram 66 by means of a pin 71 and a pair of rods 72 have one end connected with the pin 71 and their opposite ends secured together by means of a yoke 73. The rods 72 are arranged to reciprocate with the ram 66' and springs 74 are arranged on the rods 72, between the end of the housing 65 and the yoke 73, so that, when the ram 66 moves towardthe arbor 58 the springs 74 will be compressed and return the ram 66 to its inoperativeposition. A dash-pot cylinder 75 is secured to the housing 65 by means of a U-shaped bracket 76, to which the cylinder is attached. The piston 77 in the cylinder 75 is connected with the yoke 73 by means of the piston rod 78 so that the piston 77 will reciprocate with the ram 66. ,A cook 79 communicates with the compression space, in the cylinder 75, between the end of the piston 77 and the end 80 of the cylinder and the speed of returnof the ram66 may be regulated by means of the cook 79. i

The coiling die, which is indicated generally by the numeral 61 has secured therein a hardened steel block 81 having a curved surface 82 against which the stock 47 is projected by the feed rolls. The curvature of the surface 82 is on the same radius asthe outside of the coil into which the stock is formed. After leaving the surface 82 the stock 47 engages with a roller 83 which is mounted on V a pin 84. The roller 83 facilitates the movement of the stock through the die and assists in the coiling. operation. A hardened steel finger 85, having a beveled surface 86, is secured by cap screw 85 in the coiling die, against the plate 81 so that as the stock starts on the second convolution of the coil it will be deflected in an axial direction as will be seen from Fig. 8. Another hardened steel block 87 is secured to the coiling die by means of cap screws 88 and is provided with a beveled surface 89 which further deflects the stock in an axial direction, after the stock has passed the finger 85.

In the operation of the machine the shaft 21 is continuously rotated and the feed rollers will be intermittently actuated and move the stock forward into the coiling die during a part of each revolution of the fly-wheel 24. Assuming that the machine has been operated to form the stock into a coil having two convolutions as shown in Figs. 8 and 10, and that the feeding operation has been interrupted,

further rotation of the shaft 21 will actuate the plunger 22 and the cutoff die or punch 90 will cooperate with the cutting surface 91 on the arbor 58 to sever the coil that has been formed so as to leave two complete convolutions on the arbor 58. After the punch 90 has returned to its inoperative position the hump 26, on the cam 25, will actuate the plunger 28 which, in turn, will actuate the bending die 67. As shown in Fig. 8 the die 67 cooperates with the finger 85 to form a reverse bend in one of the convolutions of the coil into which the stock has been formed. After the hump 26, of the cam 25, passes the roller 27,the springs 74 will return the die 67 to the position shown in Figs. 3 and 4 and then the feed wheels will be actuated to feed the stock forward an amount equal to the stock contained in the completed washer which will usually be from one and three fourths to two convolutions. One of the completed washers is shown in Fig. 13. At the conclusion of the feeding operation the plunger 22 will again descend and the punch 90 will cut ofi the completed washer which will drop off of the arbor 58 and the bending die 67 will then be again actuated and the sequence of operations repeated.

Having thus described my invention I claim:

' 1. In apparatus of the class described,'stock feeding means, a die into which the stock is fed endwise, said die having an arbor and means for coiling the stock into the form of a helix and including a finger projecting into the helical path of the stock and having a beveled surface for deflecting the stock axially of the helix, a die movable axially of said arbor and adapted to cooperate with said finger to form a reverse bend in one of the.

convolutions of the helix into which the stock has been coiled, and means for cutting said helix into sections.

2. In apparatus of the class described, the combination of a die into which the stock is fed endwise, said die having an arbor and means for coiling the stock into the form of a helix and including a detachable finger proj ecting into the helical path of the stock and having a beveled surface for deflecting the stock axially of the helix, a die movable-axially of said arbor and adapted to cooperate with said finger to form a reverse bend in one of the convolutions of the helix into which the stock has been coiled, means for advancing the stock through the first mentioned die, and a die cooperating with said arbor to cut off a section of the helix.

3. In apparatus of the class described, the combination of a die into which the stock is fed endwise, said die having an arbor and means, including a roller, for coiling the stock into the form of a helix, said die also having a finger projecting into the helical path of the stock and provided with a beveled surface for deflecting the stock axially of the helix, a die movable axially of said arbor and adapted to cooperate with said finger to form a reverse bend in one of the convolutions of the helix into which the stock has been coiled, actuating means for the last mentioned die, including spring return-means and a dash-pot for regulating the return stroke of said actuating means, means for advancing the stock through the first mentioned die, and a die cooperating with said arbor to cut off a section of the helix.

4:. In apparatus of the class described, the combination with a press comprising a rotating shaft, a cam on said shaft, a plunger actuated by said shaft and an adjustable-throw crank, of rotary stock-feeding means intermittently actuated by said crank to feed a predetermined length of the stock, a coiling die into which the stock is fed by said feeding means, an arbor associated with said coiling means and about which the stock is coiled, a die movable axially of said arbor and actuated by said cam, while said feeding means is idle, to form a reverse bend in one of the convolutions of the coil into which the stock has been formed. and a cutofi die carried by said plunger and actuated thereby to cut off a section of the coiled stock while the stock feeding means is idle and prior to the operation of said bend-forming die.

In testimony whereof, I hereunto aflix my signature.

LEAVITT A. SHERTZER. 

